Why won’t Argos let me return my Furby after security alert?

I bought it early as a Christmas present but I now learn it could be hackedIn an uncharacteristically early stab at my Christmas shopping in September, I spent £24.99 on a Furby Connect toy from Argos for my nine-year old grand-daughter, unaware it is one of several such “intelligent” dolls that have been the subject of security concerns. There seems to be mounting evidence that strangers can hack into them and talk to children playing with them. I find this deeply worrying and